I think you are conflating purple with (spectral) violet here. All purples are created from the mixing of high and low wavelength and are not present in the rai

I think you are conflating purple with (spectral) violet here. All purples are created from the mixing of high and low wavelength and are not present in the rainbow. Violet, which is present in the rainbow, is not available for addition in the links provided since it can't be represented on computers using blue as their lowest wavelength primary.